British Guiana vs Demerara River

British Guiana and Demerara River both are nouns.

Word	Noun	Adjective	Verb	Adverb
British Guiana	Yes	No	No	No
Demerara River	Yes	No	No	No

British Guiana (noun)	Demerara River (noun)
a republic in northeastern South America; formerly part of the British Empire, but it achieved independence from the United Kingdom in 1966	a river in northern Guyana that flows northward into the Atlantic